How to Format a Professional Screenplay in 2025 (Complete Guide)

How to Format a Professional Screenplay in 2025: The Ultimate Guide

You have a brilliant idea for a film. You open a blank document — and immediately panic. What font? What margins? How do you write dialogue? How do you indicate an exterior scene?

Screenplay format is not an arbitrary convention. It is a universal visual language, born in Hollywood in the 1930s, that every professional reader — script readers, producers, directors — decodes in seconds. A badly formatted script gets rejected before the first page is read. Conversely, a document that follows the rules immediately signals that its author is serious.

This guide walks you through every formatting rule in use in 2025, from margins to transitions, covering action lines, dialogue, and parentheticals. By the end, you will know exactly how to produce a document ready for a professional pitch — and how tools like Slash can automate all of it for you.

The Fundamentals: Font, Margins, and Page Layout

Professional screenplay format rests on three unchanging pillars.

Courier 12 Font

The industry standard font is Courier 12-point (or Courier New 12). This monospaced font — where every character occupies exactly the same width — has one crucial property: a correctly formatted screenplay page equals approximately one minute of screen time. A feature-length screenplay therefore runs between 90 and 120 pages.

Do not be tempted to use a more modern font like Arial or Times New Roman. It signals immediately to any professional that you are unfamiliar with industry conventions.

Margins

Screenplay margins follow precise rules:

  • Left margin: 1.5 inches (3.81 cm) — wider to allow for binding.
  • Right margin: 1 inch (2.54 cm)
  • Top and bottom margins: 1 inch (2.54 cm)

Page Numbers

Page numbers appear in the top right corner, followed by a period. The title page (and typically the first page of the script itself) is not numbered. From page 2 onward, every page carries its number.

Pro tip: setting all these parameters manually in Word or Google Docs is tedious and error-prone. A dedicated tool like Slash applies every setting automatically the moment you open a new project. No rules to memorize — you can focus on the story.

Structural Elements: Scenes, Action, and Dialogue

The body of a screenplay is built from a set of distinct elements, each with a specific horizontal position on the page.

The Slug Line (Scene Heading)

The slug line tells the reader where and when a scene takes place. It is always written in uppercase and follows this rigid format:

INT. LOCATION NAME - DAY
EXT. LOCATION NAME - NIGHT
  • INT. for interior, EXT. for exterior.
  • The location name must be consistent throughout the script (if you write MARIE'S APARTMENT in scene 3, do not write MARIE'S PLACE in scene 12).
  • The time indicator is most commonly DAY, NIGHT, MORNING, EVENING, or LATER.

The slug line sits at the left margin (1.5 inches).

Action Lines

Action lines describe what the camera sees. A few essential rules:

  • Write in the present tense, third person.
  • Limit descriptions to what is visible or audible: a screenplay does not describe a character's thoughts, only what can be seen or heard on screen.
  • Keep paragraphs short — 2 to 4 lines. A 10-line action block is a warning sign: either you are over-describing, or the scene should be broken into multiple beats.
  • A character's first appearance is written in uppercase: MARIE, 30s, strides into the room.

Action lines also sit at the left margin.

Dialogue

A dialogue block contains three elements:

  1. Character name: uppercase, centered at 3.7 inches from the left edge (roughly 2.2 inches from the left margin).
  2. Parenthetical (optional): tone or minor action note, at 3.1 inches from the left edge. Use sparingly — well-written dialogue rarely needs them.
  3. The line itself: centered between 2.5 and 6.0 inches from the left edge.

Example:

                    MARIE
          (sarcastically)
     You call that cooking?

The most common dialogue mistakes: overusing parentheticals, writing speeches that run too long, or using a character name that is not exactly consistent across scenes. Slash automatically handles alignment and offers character name auto-completion — invaluable when your script passes 50 pages.

Transitions, Titles, and Advanced Elements

Transitions

Transitions indicate how the story moves from one scene to the next. They sit flush against the right margin, in uppercase.

  • CUT TO: — the default transition. Many modern screenwriters no longer write it between every scene because it is implied. Reserve it for a deliberately abrupt cut.
  • DISSOLVE TO: — signals a gentle time jump.
  • FADE OUT or FADE TO WHITE — end of an act or of the film.

The very first line of a screenplay is FADE IN:, and the very last is FADE OUT followed by THE END.

The Title Page

A professional title page includes:

  • The title of the film, in uppercase, centered vertically and horizontally on the page.
  • Written by followed by the author's name, centered below the title.
  • The author's (or their agent's) contact details, bottom left or right.
  • A date is optional — some professionals advise against it so your script does not appear dated.

Scene Numbers

Production drafts (when a film is actively in pre-production) include scene numbers in the left and right margins to facilitate breakdown. Spec scripts (written for sale or submission) generally do not include scene numbers.

Why Use Dedicated Software Instead of Word?

Applying all these formatting rules manually in Microsoft Word or Google Docs is technically possible, but it is a constant source of errors and frustration. A single copy-paste can throw off every dialogue block. A font change can break your entire pagination.

Dedicated screenwriting tools — and Slash in particular — solve these problems at a structural level:

  • Automatic formatting: pressing Tab or Enter cycles through elements (action → character → dialogue → action) with no need to check margins manually.
  • Live pagination: the "1 page = 1 minute" rule is respected in real time.
  • Professional PDF export: generate a submission-ready PDF in one click, with the correct font, margins, and page numbers.
  • Real-time collaboration: write with co-authors on the same script without the version-conflict nightmare of a shared Word document.
  • Modern interface: unlike aging tools such as Final Draft, Slash offers a fluid experience on Windows, Mac, or directly in your browser.

For film students or first-time screenwriters, the learning curve with Slash is nearly zero: the interface naturally guides you toward the right format at every step.

Conclusion: Format in Service of Story

Mastering professional screenplay format means learning to speak the language of the industry. It is not a creative constraint — it is a sign of respect toward the readers who will spend their time with your story, and proof that you are ready to work like a professional.

The rules in this guide have been universal and stable for decades: Courier 12, precise margins, uppercase slug lines, centered dialogue. In 2025, a good screenwriting tool like Slash applies all of these rules automatically, freeing you for what actually matters: your story.

Try Slash for free at slash-studios.com and write your first screenplay to industry standards, starting today.

Slash — Free Screenwriting Software